AppSync offers quite some functionality to respond to failing condition checks, [see](https://docs.aws.amazon.com/appsync/latest/devguide/resolver-mapping-template-reference-dynamodb.html#aws-appsync-resolver-mapping-template-reference-dynamodb-condition-expressions). I'll provide a PR that covers the simple cases for `PutItem` resolvers soon.
AppSync offers quite some functionality to respond to failing condition checks, see.
I'll provide a PR that covers the simple cases for
PutItemresolvers soon.